Failed to start game Team Fortress 2 in Steam with Windows 8

Downloaded and installed the Team Fortress 2 in my Windows 8 PC and now when I try to start the game I get the error message as “Failed to start game (App already running)”. What does it mean? I never started the game before? Is it some bug in Windows 8 or problem with the game? Someone please help me to fix this issue. Thank you.

Re: Failed to start game Team Fortress 2 in Steam with Windows 8

hello guest
you are unable to run ths game due to following reason
1 may be game is not compatible
2 game file may be corrupted
3 virus in your computer
just follow these steps to solve your problem
1 check your game version is latest and must be compatible with window8
2 also take care that gamefile not be corrupted
3 if it is corrupted than
4 delete it
5 reinstall it
your problem will be solved
good bye

Re: Failed to start game Team Fortress 2 in Steam with Windows 8

Hello Friend,

Just Follow Some Steps Are :

>> Firstly Press The Ctrl + Alt + Del Keys At The Same Time
>> And Release When You See The Many Option So Select The Task Manager From The Option
>> Now Stop The Game Process Which Are Running
>> After That Restart The PC
>> Now Click On The Game Icon And Open The Game
>> And See Game Works Or Not
>> If Not Working Than Re-Installed The Game And Play The Game Without Any Issue.

Re: Failed to start game Team Fortress 2 in Steam with Windows 8

The Game is not running under Windows8, and the reasons might be varied.

Compatibility issue, the downloaded game is incompatible to Windows 8 which needs latest version of the game.
The source file of the game is virus infected.
The installation was incomplete or damaged later.
Sometimes the antivirus that is installed in the system stops the game from running , disable antivirus for once and try the game if it starts.

Uninstall the game, download another latest version of the game, install with custom settings.